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Technical and scientific discussion of amps, cables and other topics.

Re: SY in his own speak (John Curl's wire test)

Just for the record, I visited John a couple months back. He was quite open about everything he was doing and let me look at anything I liked and try anything I liked. At the time, I promised to hold any results I got in confidence until I was finished and John could look at my conclusions and either approve, argue me out of them, or ask me to not say anything (this was my suggestion, not John's). I'm still honoring that, but feel the need to comment on one or two things brought up here.

First, John is correct about noise pickup issues. Some aluminum foil and a clip lead made a large difference!

Second, the artifacts did seem to be quite repeatable as we switched cables around, reversed direction, plugged the same cables in and out... the usual high school science fair stuff.

Third, there were some clear follow-up experiments that needed to be done. The time limiting factor has been me, not John- the past couple of months have been rather tumultuous at work, and I've had a lot of child-care commitments. The last 5 times I've been down in Berkeley, I've had my 3 year old with me, and I don't want him running around loose trying to destroy John's nice speakers, or pulling a spectrum analyzer off of the top shelf and onto his little head. That could be very damaging to the spectrum analyzer.

In any case, we don't have enough data yet to say categorically whether those artifacts are really due to wire issues and if so, what the mechanism is, but I have a pretty clear idea on what the next set of experiments ought to be and I've made up the appropriate cables to do them. And John is ready to have me back whenever I want. If I can find some more reliable babysitters, I hope to be able to finish this up pretty soon.

SY/ slummin' it away from my cyberhome



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